Slight knocking on idle
#2
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I have it on my WS6 and everytime I go to change the oil at 3000 it still comes out with a goldish color to it. I haven't worried about it because of that. It sounds like a sleight knock then seems to get a little better once the motor is warmed up. I've heard the LS6 blocks can possibly do that and it's on the #1 cylinder. Doesn't mean you have an LS6 motor, just the block possibly if it's on your VIN code.
#5
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my o2 ws6 does the same thing. it is piston slap. some people liken the sound to a diesel engine. i was worried about it because my car has 24k miles on it. a family friend is a shop manager at a gm dealership and he said that he has torn down hundreds of LS engines with the piston slap problem and none of them had any unusual wear on the piston or cylinder wall. like i said, he's a family friend ( grew up with my father) and wouldn't lie to me. so, hope this eases your mind about the noise. From what i've read/heard, just let the motor warm up to operating temp. before you start to burn rubber, and you'll be fine. as a side note, the truck LS engine were really bad with the piston slap. i've heard some trucks that sound just like a duramax diesel, that had LS engines in them.
#6
yeah man, my 2002 ws6 has a slight piston slap when i first start it up, it goes away real fast, when it starts warming up. i have been told that using thicker oil will quiet it up real nice, but i have yet to try it. but like o2ws6nbm says, its nothing unusual, and is very common on our cars.
hope this helps
Dave
hope this helps
Dave
#7
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I kinda freaked out heard it for the first time(few weeks ago). The car still performs good and everything. If you open the car door and step out and just stand there you can hear it real good. tap, tap, tap, tap. It's annoying! I hope nothing is wrong with mine. Mine, I would consider and little louder and more noticeable than a "slight" tapping/knocking noise. But then again I haven't heard yours.
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#12
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I kinda freaked out heard it for the first time(few weeks ago). The car still performs good and everything. If you open the car door and step out and just stand there you can hear it real good. tap, tap, tap, tap. It's annoying! I hope nothing is wrong with mine. Mine, I would consider and little louder and more noticeable than a "slight" tapping/knocking noise. But then again I haven't heard yours.
Well at least I feel better knowing it won't throw a rod or some crazy sh*t like that.
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+1 on the piston slap but i also could be rocker arms i have heard of needle pins falling out of rockers making them vibrate ever so slightly making a faint ticking noise nothing to worry about but then again neither is the piston slap